Source Code

Problem: 1111  User: yzhw 
Memory: 456K  Time: 0MS 
Language: G++  Result: Accepted 

Source Code 
# include <iostream>
using namespace std;
char map[22][22];
bool scan[22][22];
int det(int x,int y)
{
    if(map[x][y]=='.'||scan[x][y]) return 0;
    else
    {
        int res=0;
        scan[x][y]=1;
        if(map[x-1][y]=='.')
        {
           res++;
          
        }
        if(map[x+1][y]=='.')
        {
           res++;
           
        }
        if(map[x][y-1]=='.')
        {
           res++;
        
        }
        if(map[x][y+1]=='.')
        {
           res++;
        
        }
        res+=det(x+1,y)+det(x-1,y)+det(x,y+1)+det(x,y-1);
        res+=det(x+1,y-1)+det(x+1,y+1)+det(x-1,y+1)+det(x-1,y-1);
        return res;
   }
}
        
int main()
{
    while(1)
    {
       memset(map,'.',sizeof(map));
       memset(scan,0,sizeof(scan));
       int r,c,x,y;
       cin>>r>>c>>x>>y;
       if(!r&&!c&&!x&&!y) break;
       for(int i=1;i<=r;i++)
           for(int j=1;j<=c;j++)
              cin>>map[i][j];
       cout<<det(x,y)<<endl;
    }
   
    return 0;
}